Try our new research platform with insights from 80,000+ expert users

Microsoft Defender for Office 365 vs Trend Micro InterScan Messaging Security comparison

 

Comparison Buyer's Guide

Executive SummaryUpdated on Dec 3, 2024

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

Microsoft Defender for Offi...
Ranking in Email Security
1st
Ranking in Secure Email Gateway (SEG)
1st
Average Rating
8.4
Reviews Sentiment
6.8
Number of Reviews
60
Ranking in other categories
Email Archiving (1st), Advanced Threat Protection (ATP) (2nd), Microsoft Security Suite (10th)
Trend Micro InterScan Messa...
Ranking in Email Security
37th
Ranking in Secure Email Gateway (SEG)
15th
Average Rating
7.0
Reviews Sentiment
7.1
Number of Reviews
3
Ranking in other categories
No ranking in other categories
 

Mindshare comparison

As of January 2026, in the Email Security category, the mindshare of Microsoft Defender for Office 365 is 9.6%, down from 13.9% compared to the previous year. The mindshare of Trend Micro InterScan Messaging Security is 0.5%, down from 0.6% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Market Share Distribution
ProductMarket Share (%)
Microsoft Defender for Office 3659.6%
Trend Micro InterScan Messaging Security0.5%
Other89.9%
Email Security
 

Featured Reviews

Emeka Ndulu - PeerSpot reviewer
Cloud Solutions Architect at a tech services company with 201-500 employees
Improves threat visibility and response while reducing manual tasks and training users against phishing
I appreciate the attack simulation feature whereby I get to train users and educate them on how to identify phishing emails and spam emails, as well as the anti-spam protection. It gives me visibility into my threat environment and threat landscape to ensure that I am one step ahead of any likelihood of threats within my environment. I get to detect it and respond, so the threat intelligence is very effective. Microsoft security solutions save my time. It saves money because once I protect my environment, I don't lose money. It has decreased my detection time and my time to respond.
Abdul  Waris - PeerSpot reviewer
Tech Operations at Martin Dow Limited
Deploy features like DLP and BEC for enhanced security
Multiple clients are using email security. We provide solutions based on what they need, and we configure them accordingly as per the requirement With Trend Micro email security gateway, we can deploy features like DLP and BEC. It includes Office 365 protection and sandboxing. This provides…

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Pros

"The ability to respond to threats if very important."
"Defender for 365 is a comprehensive cloud-based solution. The value of the cloud is that you aren't alone. Threat intelligence and analytics are shared in the cloud. We don't have to find the solution alone. If you face an unknown threat with traditional solutions like Trend Micro and Symantec, you need to open a case and send your information to them to analyze forensically and identify the source of the attack."
"Does a thorough job of examining email and URLs for malicious content."
"Some of the valuable features on the email side are anti-phishing, anti-malware, and Safe Links."
"The insights provided with Microsoft Defender for Office 365 are helpful because it comes with the E5 license, and by default, we can use a lot of capabilities."
"The feature I like the most about Microsoft Defender for Office 365 is that it typically runs in the background—you do not know it is there until you need to access it."
"The DLP feature of Microsoft Defender for Office 365 is valuable, and we also use the DLP feature for email real-time detection."
"I like its investigation capabilities, as that is what is most important to me. It is fairly simple with a user-friendly interface."
"With Trend Micro email security gateway, we can deploy features like DLP and BEC."
"With Trend Micro email security gateway, we can deploy features like DLP and BEC."
"The solution provides protection with its Email Track Records and Machine Manual features."
"The technical support services are excellent."
 

Cons

"They can improve their security in a way where a customer can know if all their attachments are safe or not to open through a report. The solution does its job perfectly, but it never reports to the customer whether those attachments have been stopped before or not."
"It is not up to the mark in comparison with Wiz or Palo Alto."
"Specifically, within Microsoft Defender for Office 365, I want it to improve the DLP capabilities."
"The visibility for the weaknesses in the system and unauthorized access can be improved."
"Several simulation options are available within 365, and the phishing simulation could be better."
"I assess the stability and reliability of the solution as seven out of ten."
"I'd like some additional features any product can give me to protect our environment in a better way."
"Microsoft Defender for Office 365 should improve the troubleshooting tools. It's unclear whether the device is blocked at the firewall level or at the device itself. The granularity needed for troubleshooting is currently lacking. From my perspective, Microsoft should address this issue to benefit many users who likely share the same sentiment."
"There is room for improvement in content filtration, expressions, file sharing, and policy configuration."
"There is room for improvement in content filtration, expressions, file sharing, and policy configuration."
"The product's pricing could be more flexible."
"The solution's pricing could be improved."
 

Pricing and Cost Advice

"While Microsoft Defender for Office 365 necessitates pricier E3 or E5 subscriptions, the extensive functionality offered by these licenses across various Microsoft products justifies the investment."
"Microsoft Defender is expensive. I typically recommend it only if clients have the budget. Otherwise, I would suggest an alternative."
"The pricing is normal. Considering its popularity, it's not overpriced."
"Compared to other brands, Microsoft Defender for Office 365's pricing is competitive."
"The pricing has become expensive."
"I know that the product is incredibly expensive."
"The product is expensive."
"It's a user-base subscription."
"Trend Micro is an expensive solution."
"I rate Trend Micro InterScan Messaging Security’s pricing a seven out of ten."
report
Use our free recommendation engine to learn which Email Security solutions are best for your needs.
881,082 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Computer Software Company
14%
Financial Services Firm
8%
Manufacturing Company
8%
Comms Service Provider
6%
Performing Arts
15%
Manufacturing Company
12%
Financial Services Firm
8%
Computer Software Company
6%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
By reviewers
Company SizeCount
Small Business23
Midsize Enterprise10
Large Enterprise31
No data available
 

Questions from the Community

What needs improvement with Microsoft Defender for Office 365?
The inbuilt analysis of false positives can be faster. It's not slow, but it can be faster.
What is your primary use case for Microsoft Defender for Office 365?
My use case for Microsoft Defender for Office 365 is for email protection, safe links, protection of links, documents, protecting my documents, and protecting attachments. I also use it to conduct ...
What is your experience regarding pricing and costs for Trend Micro InterScan Messaging Security?
The price is a bit high because the market is highly competitive. Multiple platforms are available, so we have to choose based on comparison.
What needs improvement with Trend Micro InterScan Messaging Security?
There is room for improvement in content filtration, expressions, file sharing, and policy configuration. We could decrease the price in email security gateway and cloud security services.
What is your primary use case for Trend Micro InterScan Messaging Security?
Multiple clients are using email security. We provide solutions based on what they need, and we configure them accordingly as per the requirement.
 

Also Known As

MS Defender for Office 365
InterScan Messaging Security
 

Overview

 

Sample Customers

Microsoft Defender for Office 365 is trusted by companies such as Ithaca College.
Copa Airlines, Air21, BookMyShow, Bulgarian American Credit Bank, Canadian Museum of History, CIBIL, Community National Bank, Dar Al-Handasah
Find out what your peers are saying about Microsoft Defender for Office 365 vs. Trend Micro InterScan Messaging Security and other solutions. Updated: January 2026.
881,082 professionals have used our research since 2012.